Originally Posted by
Face_N_The_Crowd
Just a little update on this -
Something in the back of my mind said "confirm the ability to lock back with factory ammo".
So I had some BH 75s and AE 63's - one round in the mag, 3 mags - none worked.
Light bulb goes on.
I pulled the rail and the FS and checked the gas tube.
I pulled the bolt and slid the carrier fore and aft in the receiver several times confirming that there was zero resistance at the gas tube.
I then grabbed an old 20 rnd (empty) and inserted it and pulled the charging handle all the way to the rear - no lock back.
The bolt catch felt gritty so I pulled it out and smoothed it with a flat file and emory cloth, a hit of Tetra grease and smidge of Tetra oil and reinstalled it. Still no joy. Still felt a little grabby on the front side and the spring tension was over the top. So I pulled it again and really looked at - I am not convinced that the cast peice (CMT LPK) is vertically plumb and think that causes the rub - cuz it smooth after my efforts with the file and emory cloth. Instead of screwing with the geometry of the part I attacked the other issue - the spring tension. I clipped 1.5 coils. After lubing and putting it back together I tried that same (empty 20rnd mag) - bingo. Works like a charm. That said, 1.5 coils was too much to clip - with the mag out and the bolt locked back any kind of a bump to the weapon (anywhere) will release the bolt. So I need a new bolt catch spring. In the mean time I think I will pull this apart again and stretch the spring to get the tension I need.
I *think* the gun will run and lock back with Wolf after this. I will stretch the spring and run some Wolf (and factory good stuff) later in the week and update.